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George Moroses

Infor LX & BPCS Manufacturing Tip of the Week: Backward Scheduling

Operations are automatically backward scheduled at shop order release time. The backward scheduling algorithm starts with the shop order due date and schedules each operation based upon the standard move and queue times in the routings and the number of days the job is expected to run at standard. The system calculates and stores the operation scheduled start date. The dates may be modified by the shop order maintenance program. The number of days that a job is expected to run an operation is dependent upon the available capacity for that work center and the total hours scheduled for that operation.

The backward scheduling algorithm also considers the shop calendar for weekends, shutdowns, holidays, and partial days.

Backward Scheduling Process

The algorithm starts with the due date of the shop order or planned order. The system makes the following calculations for each operation in the reverse sequence:

  1. The number of move days is subtracted from the due date (or initial date of the previous operation) to get the due date for this operation. The move days are only used on valid shop calendar days.
  2. The system uses the following calculation for the number of clock hours for the operation: Standard run or machine hrs/No. of operators + setup hours
  3. The number of clock hours is spread over the available daily capacity of the work center for those given days. The system uses the following calculation for the daily capacity of the work center: Number of shifts x hours per shift x average efficiency/100
  4. Each day is checked against the shop calendar; the calculation bypasses inactive days or adjusts for any changes in the work center capacity for that day.
  5. Queue time days are subtracted in the same manner as move time days. The resulting date is the operation start date.

The algorithm then goes to the previous operation. When all operations have been included, the resulting date is the scheduled start date of the shop order. Note that MRP uses the item lead time to determine material requirement dates on planned orders.

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Tips:  LX | BPCS | M3

  • Sit down with your IT team. Decide how the information will be captured and where it will be stored so that employees have access to it. What software tools need to be used to capture the information? How does it need to be organized? Create a repeatable process to make this easy for your staff.
     
  • Interview the person. Have them talk you through his/her job. What are the things they do every day? What are their biggest challenges? How do they overcome them? 
     
  • Have someone shadow the person for a week. Watch what they do and how they do it. Ask questions. Who does he/she interact with in their department? Outside of their department? Why?
     
  • Find out what tools he/she uses to perform their job? Are there spreadsheets?  Reports within your ERP / outside of your ERP? Separate stand-alone databases? Drawings? Websites? Why does he/she use them?
     
  • Video record how the person does their job. Is their technique critical to “doing it right” the first time and not ending up with a bunch of scrap that you can’t reuse?
     
  • Figure out if the person does anything special on a monthly, quarterly, or annual basis that might not come up during the observation period or interview. 
     
  • Map how he/she uses your business system and how that impacts the rest of the company. Understand both the “what” and the “why”. Without this, new employees may end up figuring out what they need to do, but never understand why they need to do it.

Optimize Your Manufacturing Today!

  • Are you tracking downtime? Is it done manually, or with some type of automation or application that gathers information in real-time, or is it based upon history?
  • If you are measuring team effectiveness by shift, you know there are significant differences between them. Have you figured out why?

One of our automotive customers was experiencing significant inefficiencies and difficulties with their receiving operations. After analyzing their operation, we discovered a disconnect between how they were tracking their incoming goods and what their ERP system thought was on hand.

This disconnect created time-consuming steps to process incoming material and determine where the material was needed. The manual process slowed production, caused additional staffing needs and hindered their ability to effectively get needed material to the assembly line. They chose to implement our data collection solution to automate the process.

Since implementing the solution, receiving and moving material was quicker, more accurate and efficient. This enabled the addition of another assembly line, increasing production volume – without adding staff.

Optimize Your Manufacturing Today!

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Tips: LN | Baan

All actions required for converting, validating, matching, and posting electronically received bank statements can be performed within a single session:

  • Bank Statement Workbench (tfcmg5610m100)
  • Bank Statement (tfcmg5610m000)

Alternatively, you can use the sequence of electronic bank statement sessions outlined below.

Steps to Process Electronic Bank Statements:

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